Blast-nozzle



BLAST-NOZZLE.

Application filed April 21, 1919.

To all whom it may concern: 7

Be it known that we, JOHN M. HoPwooD and THOMAS AVPEEBLES, residing at Dormont and Pittsburgh, respectively, in the county of Allegheny andState of Pennsylvania, citizens of the United States, have invented or discovered certain new and useful Improvements in Blast-Nozzles, of which 7 improvements the following is specification.

In order to maintain a maximum efficiency in conveying systems where the material is moved'by currents produced by jets of steam or air,it is necessary that the nozzles should have certain predetermined dimensions, shape and contour. By means of the location of these nozzles, to make accurate measurements to ascertain when, by reason of the cutting action of the fluid passing through the nozzle, the shape, dimensions, etc., of the nozzle have been so changed as to materially reduce the ciliciency of the nozzles.

The invention described herein has for its object the provision of means whereby audible or visible indications may be given in case of a change in dimensions or shape which would tend to reduce the efliciency of the nozzle. The invention is hereinafter more fully described and claimed.

In the accompanying drawings forming a part of this specification, Figure l is a sectional View of the improved nozzle and Fig. 2 is a similar view illustrating a modification of the construction shown in Fig. 1, and Fig. 3 illustrates a further modification of the improvement.

In the practice of the invention the nozzle consists of inner and outer shells l and 2, the shell 1 being constructed internally with the usual or any suitable dimensions. The external shell is made with substantially uniform internal dimensions for the reception of the inner shell which has its rear portion formed so as to fit slidably Within the outer shell. The forward portion of the inner shell is made smaller than the internal di-' amter of the shell 2 and such reduced portion is adapted to slide through a collar 4: preferably formed independent of the outer sleeve and screwing thereinto. The inner shell is held from rear. movement by a ring 5 which will also prevent a leakage of steam in between the innerand outer shells. In order to prevent movement of the inner shell Specification of Letters Patent.

it is usually difficult Patented June 14, 1921. SerialNo. 291,478.

due to pressure of fluid'against its rear end a suitable lock 1s provided. This lock should be 'of such a character that in case the innershell is cut through by the fluid jet at any polnt adjacent to its discharge end, thelock will be broken thereby permitting of the inner shell being forced forward sufficiently far to uncover the port 6, permitting the fluid under pressure to flow through the passage 7 and operate a signal such for example as the whistle 8. A convenient lock consists of a piece of wire, preferably spring wire, 9, drawn into a groove 10 in the reduced portion of the inner shell and so located that the wire ring will bear against the collar. The wire ring is held in place in the groove and against the collar in any'suitable manner as for, example by twisting together the ends as-shown. The ring 9 being formed of spring wire will, as shown, when it is cut by the action of the fluid, spring out of the groove and permit the inner sleeve to be forced forward uncovering the port 6. In order to insure the removal of the ring from the groove groove is inclined so as to ring outwardly.

In case cutting action should occur in the throat, a series of holes 10 are bored radially from the exterior of the inner shell into proximity to the inner surface of the shell. These holes have their outer ends connected to the passage 7 through such holes will operate the signal.

As the operation of the nozzle is not usually desired after such cutting action as will cause the operation of the signal, provision is made for operating a valve to prevent the further flow of steam through the nozzle. In the construction shown, a valve 11 is so connected by rods 12 to the inner shell that when the shell is forced forward the valve will be drawn against a seat 13 at the entrance'end of the nozzle as shown in Fig. 2.

As shown in Fig. 3 an electrically operated signal may be employed. In such case the ends of a circuit including a hell if), and battery 14 are connected to contacts 15 arranged in the path of movement of the inner shell so that the circuit will be closed when the shell is released.

lVe claim herein as our invention:

1. A fluid nozzle provided with a port push the broken so that fluid escapingtion an outer shell, an inner shelladapted to be shifted by pressure of fluid flowing through the shell, a port in the outer shell adapted to be closed by the inner shell when in normal .position, means destructible by the cutting action of the fluid for holding the inner shell 1n normal position and 1ndicating means operative by fluid escaping throu h the port.

3. nozzle for nation an outer shell and an inner shell movable in the outer shell by thepressure of fluid flowing through the inner shell, a lock for holding the inner shell in normal position and adapted to be destroyed by the action of fluid flowing through the inner shell, and indicating means operative on the movement of the inner shell from normal positlon.

4. A nozzle for steam or air blasts having through the through the nozzle, and means for holding the member fluids having in combi-V in combination therewith an indicating means, a movable member controlling the operation of the indicating means and mov-' able by the pressure of the fluid flowing and a lock for holding the movable member stationary and adapted to be broken by the action of the fluid flowing through the nozzle. 7

5. A nozzle for steam or air blasts having in combination a-movable member adapted to be shifted by the fluid flowing through the nozzle, and indicating means, a valve for, checking the flow of the fluid through the nozzle, said indicating meansand valve being operative on the movement of the movable member from normal-position, and a frangible lock for holding the movable member in normal position 6. A nozzle having in combination therewith an indicating means, a movable member controlling the operation of: the indicating means, and means for holding the movable member in normal position and adapted to be cut away by the action of the fluid to release the movable member.

' In testimony whereof we'have hereunto set our hands. r

' J'oHNM. I-IOPWOOD.

THOMAS A. PEEBLES. 

